in src/main/java/org/apache/maven/shared/dependency/analyzer/asm/ResultCollector.java [110:115]
public void add(final String usedByClass, final String name) {
// inner classes have equivalent compilation requirement as container class
if (name.indexOf('$') < 0) {
classUsages.add(new DependencyUsage(name, usedByClass));
}
}